Came across the story on Ars Technica last night and have been looking at my collection. So far it seems like I am OK, if there are some that aren’t I am sure the company will not give a fig. What could be the key is that Canada is officially bilingual so the discs needed french dubbing and subtitles which meant that production would outsourced to a different factory.
EDIT: If anyone has the Lenticular, 2 disc version of “V for Vendetta” with disc rot can you post details about it, I have a copy but its still factory sealed. Disc box seal is readable as {V FOR VENDETTA (TWO DISC SPECIAL EDITION) UPC:012569832356 DVE 083235}